OK so I recently got a Holley stealth ram And a set of 128 vette aluminum heads for 200 bucks.....the hsr came with fuel rails and all but someone shaved the fins off the top for some reason and the heads seem in pretty good shape.....my question is how exactly do I need to run my fuel lines and what is needed......also would these heads work good with the stealth ram? If so what can would do best? I was thinking the cc503? What needs to be done to the heads to run such a cam? Also I'm on a high school budget so any high end heads are out of the question for now

 

Have you try the search button? This is the most popular alternative intake for these cars and tons of good swap threads are available

https://www.thirdgen.org/forums/alte...ealth-ram.html


Once the heads are setup with a good valve job, good springs and clearanced for the cam lift (If needed), the CC503 is about the biggest cam I'd run with that setup and it should run pretty good Will require alot of tuning tho.

 

yea iv been reading the forums on this site since i got my car 4 years ago i just got a valid account so i could post......i know the potential of the stealth ram and all and i know the cc503 is a very popular cam....was wondering how the mpg was for this cam and this is my daily driver so not looking for anything extreme i was worried the heads wouldnt be adequate for the cam....my hsr is the older 7540 non vortec version so i couldnt use vortecs.....was gonna get pcmforless to do my tune and hope it does good until i can get the time and money to burn my own chips......i have a 2000 stall already.....would that be enough stall for this cam? i know i would prolly get better performance with a 2600 or something in that ballpark.....also i was hoping you would respond as iv been reading all your post and you seem to be one of the most knowledgeable person on the board...

 

Lol definately not the most knowledgable....just know enough to be dangerous.

503 is the biggest cam you will want to run on those heads IMO. Heads are similar to LT1 heads and most LT1 guys shoot for a cam around the 503 size for a street/strip driver. Some guys go bigger but their heads support alittle more power than out the box 128/113 castings.

If you are concerned about it being too much cam, next size down would be like a LT4 hotcam which works well. Could even jump down again to a comp cams 218/224 or 212/218 but I honestly would keep it 218 deg or so on the intake and not go any smaller. Its just not worth the effort to go any smaller on the cam swap so keep the LT4 size or 503 cam. You can find either of those cams used for cheap on camaroz28.com and LS1tech classifieds. Very popular LT1 cams which will work in the sbc roller motor assuming you have a roller cam motor! Your info says 86 which had no 350 motor and also those years didnt have roller cam provisions. If you are not roller cam, you'll need to go retrofit which adds alot of money to the swap. Or keep it flat tappet and run good oil all the time.

Its gonna have some lopey idle. It will drive ok with 2000 stall although best performance is gonna come with 3000+. Track car i'd run 3400-3600 stall easily. Street driver, 2600-2800 but you can keep your current stuff for now and wait to upgrade down the road.

I've tuned a big cam HSR setup on stock converter and they will drive fine so your setup should be alright once the tune is good. Granted the car turns into a monster with a 3600 stall to bypass the terrible low end but it will drive alright. Just alittle sluggish down low.

 

A vortec 350 bottom end was swapped in before I got the motor so its roller cam all the injectors and memcal are from an 89 350 so guessing the centerbolt heads are too.....since I will be daily driving I'm guessing the xfi 268 will be best suited?

 

It could work well enough but it does have some pretty aggressive lobes that are alittle harder on the valvetrain than you'd need/want for a daily driver. If you go that direction, I'd run Patriot Extreme Gold valve springs and retainers kit for 280 bucks or so. Good springs for cams like that. They sell them with 11/32" valvestem retainers for LT1 kits which will fit these heads. The other set is for LSx which uses a smaller 8mm stem so dont get those.

 

Well after reading plenty of posts I'm kinda leaning towards the tried and true hotcam......seems as if it would be a lot easier to work with and the performance numbers are proven.....should help me atleast crack 12s

 

Easily a 12 second combo with good tune and some converter stall on slicks. Give it 3200 atleast I'd say. It will work well with either Lt4 hotcam or 503.

 

Could I use everything in the lt4 hotcam kit for the lt1s? Seems like a pretty good deal on scoggin dickey.....

 

I wouldnt use the springs. They arent real good and wont drop in on the heads without having them modded I do believe. Else its a tight fit as they are a 1.32" diameter and I think the spring pocket is only good to around 1.27-1.29" or so? Tight fit. You'd have to measure.

Beehives would work too and likely give you enough lift capacity on the heads. Retainer to guide clearance is always an issue on factory heads, so double check your range.

 

OK thanks for the info......the heads have apparently just been freshened up to handle a ***** thumpr can before I purchased them so the springs are brand new but not sure if they will handle the hot cam

 

I pulled the valve cover off my heads today And the person who did the swap put 083's on the vortec block and they received a fresh valve job when I first got the car a few years back......which would be better suited for the hotcam? The 083 heads or the 128 vette heads?

 

The CC-306 cam is actually the one to go with. The 128 heads, kind of like the LT1 heads have a week exhaust port. The cc-306 has a mega split on the exhaust side and compensates for when a good intake (like the HSR, or a ported LT1) is used.

The 503 cam is a better choice for a head with a good e/i ratio.

The 503 is actually a killer blower cam too on a street car that you don't want to be a stone off the line. (i.e - a stick car)

-- Joe

 

Cc 306 is a great big cam for a stock head car. You've run that right? How streetable is it? 503 isnt optimal but its lower duration gives abit better compromise for the street. I've tuned the 280xfi cam in a 360" L98 and it was abit big. 306 would be even harder to tune and run abit rougher.

CC 305 cam probably is abit better. Next step down from the 306

 

I ran the CC306 on a 700R4 car. With the 2.59 rear it was garbage, but with 3.54 rear it was great. Was a '730 ECM, and took an afternoon to tune. Absolutely no problem in closed loop with that cam, and over 13hg of vac.

But again, it's for junk (stock) heads. Like the 128 vette heads mentioned above. I wouldn't run it on any good heads.


I've got to dial in my xr288hr-10 soon on my '730 ECM. I'm sure that is going to be a blast!

-- Joe

 

Hi jack. I only see speed density hsr and my car is maf will it work 113 heads stock 87 throttle body. I was going with pcmforless for the tuning it will be on a 305

 

seeing as how the intake already has a crossover line in the front of it and has fuel lines connected with fittings on the end and an adjustable regulator in tact.......could i just hook this thing up and run it?gonna replace the lines before because of how cracked and crummy they are........i also have rigged a summit liquid filled pressure gauge on the passenger side fuel rail...would this leak while running it on the car??

 

Yeah typically front crossover is by holley in the fuel rail kit, and then you have 2 rear connections that you run to the factory hard lines.

liquid filled pressure gauge is exactly what you are suppose to run It shouldnt leak, just use some thread sealant but dont put too much on it.

 

I broke the fuel line fitting in the back can I get another 1 from parts store and fuel lines I can use hose with hose clamp

 

I forgot to mention my car is a hardtop stripper with the only power option being a power 4th Gen driver seat.....would this make a marginal difference in the performance I get out of the setup? ??

 

After installing everything the TV cable comes out to the left instead of straight back like it did with the tpi....is there something wrong?? Its hooked up and adjusted but haven't driven the car to confirm the adjustment